Volume XIV. June, 1897. Number I. 
JOURNAL 
OF 
MORE TIOLOG ¥. 
TWO NEW GREGARINIDA|! 
By JAMES F. PORTER. 
I. A Gregarine from Clymenella. 
(Monocystis clymenellae 7. sf.) 
THERE is found in the body cavity of Clymenella torquata 
a gregarine which I have been unable to identify with any 
described species. It resembles, however, in many ways 
Monocystis magna from the earthworm, recently described 
by Wolters,? a species to which it is probably closely allied, 
though parasitic in a salt-water annelid. 
On cutting open a parasitized Clymenella one finds in the 
body cavity, but generally in the posterior half only, numerous 
white, opaque, oval bodies a little larger than starfish eggs. 
Microscopic examination shows that these are gregarines in 
the encysted condition. 
The cysts are often found scattered singly through the body 
wall; but in much-infested worms they are more frequently met 
with in clusters of as many as eight, ten, or even more, and are 
surrounded by loose connective tissue. 
1 Contributions from the Zodlogical Laboratory of the Museum of Comparative 
Zoology at Harvard College, under the direction of E. L. Mark, No. LXXXII. 
2 Arch.fiir mikr. Anatomie, Bd. XX XVII, 1890, pp. 99-134. 
